Shaper attachment.



C. B. RUMSEY.

SHAPER ATTACHMENT.

APPLICATION FILED DEC-26. 1914.

Patented Sept. 28, 1915.

JwwwMoz COLUMBIA PLANOCIRAPH c0 WASHINGTON n c CHARLES B. BUMSEY, oUscALoosA, ALABAMA.

' SHAPER ATTACHMENT.

so that by ad usting the tool relatively to the center of the head, itwill automatically cut a perfect circle or curves of any desired radiuswithin the capacity of the shaper.

The object of my invention is to adapt a shaper by means of myattachment to take the place of slot machines and like tools, when it isdesired to make curved or circular cuts such as 1n the case of machiningthe crown brasses for locomotive driving boxes and for other similarjobs.

My invention comprises in its preferred embodiment the details ofconstruction and arrangements of parts which are hereinafter moreparticularly described, and which are illustrated in the accompanyingdrawings, which shows a typical shaper in perspective view with mountedthereon.

The preferred embodiment of my invention, to which however I do notdesire to v limit myself except as defined in the appended claims, isshown applied to a shaper having a head 1 upon which I shrink orotherwise mount a gear 2. A small gear 3 meshes with the gear 2 and is,mounted fast on a shaft 4 which turns in bearings 5, 5, attached to theshaper. end of the shaft 1 is a worm gear 6 which meshes with the worm 7on-a worm shaft 8 which is mounted in bearings 9 (only one.

of which is shown) and which are suitably attached to the shaper. A handcrank 10 is made fast to one end of the shaft 8 and on its other end aratchet gear 11 is made fast. A rod or pipe 12 is connected at its lowerend to a fork which straddles the ratchet gear 11 and is journaled atits lower ends on the shaft 8 which is squared at its outer end 14 anddrilled to receive a cotter key 15 which holds the parts assembledthereon. Between the legs of the fork is pivoted a reversible latch 16which is adapted to swing from one side to the other thereof and. toengage the teeth on the ratchet my attachments Fast on'the rearSpecification of Letters Iatent. i atented Sept. 25, 1915.

Application filed December 26, 1914. Serial No. 879,176.

Wheel 11 and .move it in oneor the other direction according to theposition of the latch. 'I he rod or pipe 12 is adapted to slidefreely'through a hole provided therefor in the swivel head 17 whichrocks in a bearing 18 provided therefor at the top of a vertical mannerin a tool holder 23 made fast to the head 24 and adjustable therewithcrosswise of the head 1 under the control of the screw 25 in the mannerwell understood in the art.

In operation, when the work hasbeen set up on the bed 26 and the head 24adjusted to give the tool the desired radius from the center of thehead, the latchis then set in accordance with the direction in which itvis desired to turn the head 1 and feed the tool about the circle andthe shaper is started in operation. As it reciprocates, the standard 19being stationary, the fork 13 which is movable with the head 1, isrocked thereby and thelatch 16 caused to feed the ratchet and turn theworm shaft, imparting motion through the worm gear to shaft 4 andthrough gears 3 and 2 to the shaper head to turn the latter about itslong axis. By this-means the tool is moved angularly a small distancewith each stroke and by raising the standard 19, the rate of feed can bedecreased and by lowering it it can be increased, the latch being-causedto engage a lesser or greater number of teeth on the ratchet'wheel 11.The number of teeth on the ratchet wheel may be increased or diminishedfrom that shown which is merely illustrative. To reverse the rotarytravel of the tool, it is only necessary to throw the latch 16 over tocause it to engage the ratchet wheel on the other side of the fork. Whenit is desired to control the angular movement of the tool by hand, thecrank 10 is employed and the latch moved out of engagement with theratchet wheel 11.

While I have described my invention as an attachment for shapers, I wishit understood that my invention covers the application of the attachmentto any machine cutting tool to which it is adapted. It will be furtherunderstood that the mechanism described for effecting the angularadjustment of the cutting tool is what I consider preferable but it maybe varied in many ways within the scope of the appended claims. 7

Having thus described my invention, What I claim as new and desiretosecure by Let ters Patent, is zp l. The combination of a sh-ape'rhaving an endwise and angularly movable 'cu tter head, astationary-standard vertically adjustable in the shaper frame, "arockii'lg arm mounted v on and re'cip'r'o'o'able with the shaper, meanson the standard with which said arm sliding'ly engages and by which itis rocked-"as it reciproca'tes," and mechanism driven by saidoscillating member for adjusting the shaper headangularly,"siibstantially as-described. V

2. A .shaper attachment comprising, in combination, a gear fast on theshaper head and concentric therewith, a shaft reciprocable with theshape'r head, a wormdrive for said shaft, a pawl and ratchet drivemecha- V nism for the worm drive, said ratchet mechanism comprising anoscillatory 'pawl be'aron the first mentioned shaft meshing with saidworm, tl'atcl'let wheel on the, worm shaft,'an oscillatory pawl bearingmember, a pawl thereon adapted to engage the'ratchet wheel, and astationary standard having a slotted member through which said oscilla-'tory' member passes loosely and by means of Copies of this patent maybe obtainedforfive cents each, by addressing the ratchet wheel fast onsaid shaft to be driven in either Washington; D E."

. justable in said shaper, of 'a'vertical standard, means to mount saidstandard 'for'vertioal adjustment the frame, a swivel head onthe'standard, an arm in slidable engagement with the swivel head, atransverse shaft journale'd on the shaper'and on which the lower end-ofsaid arm is journale'd, a-

reversible pawl mounted on said arm, a

I 7 direction by said pawl, bearings for said shaft which are mounted onsaid shaper, a worm on said shaft, a' sec- 0nd 'shaftalsdreciprocablewith the head carryinga worm wheelk'at one end meshing with said wormand a small gear at the other end, a large gear meshingwith said lattergear and mounted fastuon the head and I concentric described.

5. A shaper attachment comprising, in combination, a gear fast on theshaper head and concentric therewith, shaft reciprocable with. theshaper head, a worm drive for said shaft, a pawl: and ratchet drive-1mechanism for the worm; drive, said ratchet mechanlsm comprising anoscillatory pawl fbea'ring member, "a stationary standard.

through which said member passes with a is rocked when the shaper headreciprocate's, a gear on said shaft meshing with the gear on said"shap'er head, means'to disconnect the worm drive from said pawl andratchet and adapted therewith, substantially V loose sliding fit and bymeans of which it driving mechanism, and means-to operate" the wormdrive by scribed; V

In testimony whereof I aflix m in presence "of two witnesses.

hand, substantially as dey signature Commissioner of Patents,

7 CHARLES nRU sEY.

